mirror of
https://github.com/notohh/rustlings.git
synced 2024-11-25 06:57:31 -05:00
26 lines
657 B
Rust
26 lines
657 B
Rust
// Type casting in Rust is done via the usage of the `as` operator. Please note
|
|
// that the `as` operator is not only used when type casting. It also helps with
|
|
// renaming imports.
|
|
//
|
|
// The goal is to make sure that the division does not fail to compile and
|
|
// returns the proper type.
|
|
|
|
fn average(values: &[f64]) -> f64 {
|
|
let total = values.iter().sum::<f64>();
|
|
total / values.len()
|
|
}
|
|
|
|
fn main() {
|
|
let values = [3.5, 0.3, 13.0, 11.7];
|
|
println!("{}", average(&values));
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn returns_proper_type_and_value() {
|
|
assert_eq!(average(&[3.5, 0.3, 13.0, 11.7]), 7.125);
|
|
}
|
|
}
|